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Non-return flaps

Non-return damper for round ducts, made of galvanised sheet steel. The throttle wings (pendulum) are closed by a spring, which allows mounting in any position.

Ventilation check dampers are special devices used in ventilation systems that allow you to control the airflow. They work on the principle of reciprocation, which means that they close when the airflow is stopped and open when the airflow is active.

Ventilation check valves are available in a variety of shapes and sizes, as well as in many different materials such as aluminum, stainless steel and plastics. This makes them easy to adapt to the needs of a specific building and ventilation system.

Ventilation check dampers are very durable and reliable, which makes them ideal for use in a variety of buildings such as production halls, warehouses, schools and other public buildings. They are easy to install and use, as well as easy to clean, which makes them very attractive to many investors.


To sum up, ventilation check dampers are very useful and durable elements of the ventilation system, which allow for the proper discharge of polluted air and provide comfort and durability. That is why they are popular among professionals in the construction industry and many others who are looking for reliable and effective ventilation solutions.